Expressions of active forms of all p90RSK isoforms were assessed by immunoblotting in Control vs. GR cells following treatment with increasing concentrations of BI-D1870 for 24 hours. Actin was included as a loading control.

(B) Treatment of HEK293T cells with the AKT inhibitors MK2206 or AT7867 abolished EGF (20 ng, 15 min)-induced binding of AKT and pT308AKT to CNK1 and also their residual interaction found in non-stimulated cells.

PF-4708671 is a cell-permeable inhibitor of p70 ribosomal S6 kinase (S6K1 isoform) with Ki/IC50 of 20 nM/160 nM in cell-free assays, 400-fold greater selectivity for S6K1 than S6K2, and 4- and >20-fold selectivity for S6K1 than MSK1 and RSK1/2, respectively. First S6K1-specific inhibitor to be reported.

The effects of H89 on bTSH-induced FASN downregulation in 3T3-L1 adipocytes. Differentiated 3T3-L1 adipocytes were pretreated with either 20 µmol/L H89 or vehicle for 1 h, then treated with 0.2 µM bTSH for 8 h. Levels of FASN, pCREB, pERK1/2 and pJNK were determined by Western blotting.